California Code, Business and Professions Code - BPC § 25660

(1) A document issued by a federal, state, county, or municipal government, or subdivision or agency thereof, including, but not limited to, a valid motor vehicle operator's license, that contains the name, date of birth, description, and picture of the person.

(2) A valid passport issued by the United States or by a foreign government.

(3) A valid identification card issued to a member of the Armed Forces that includes a date of birth and a picture of the person.

(b)(1) Proof that the defendant-licensee, or their employee or agent, demanded, was shown, and acted in reliance upon bona fide evidence, or utilized a biometric system, in any transaction, employment, use, or permission forbidden by Section 25658, 25663, or 25665 shall be a defense to any criminal prosecution therefor or to any proceedings for the suspension or revocation of any license based thereon.

(2) A biometric system utilized by a defendant-licensee shall be based upon a review of bona fide evidence of majority and identity of a person and that verifies and authenticates the validity of that bona fide evidence.

(1) “Biometrics” means the unique characteristics of a person, including, but not limited to, fingerprints, iris, face, or other similar biometric characteristics, or any combination thereof.

(2) “Biometric system” means technology that links the identity of a person to that person's biometrics.